Universal chuck



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Patented Nov. 3, 1896.

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No. 570,736. Patented Nov, 3, 1896.

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UNITED STATES PATENT OFFICE.

VICTOR A. SALLOT, OF FORT XVAYNE, INDIANA.

UNIVERSAL CHUCK.

SPECIFICATION forming part of Letters Patent No. 570,736, dated November3, 1896.

Application filed November 11, 1895. Serial No. 568,578. (No model.)

To all whom it may concern:

Be it known that I, Vroron A. SALLOT, a citizen of the United States,residing at Fort Wayne, in the county of Allen, in the State of Indiana,have invented certain new and useful Improvements in Universal Chucks;and I do hereby declare that the following is a full, clear, and exactdescription of the invention, which will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, which form part of this specification.

My invention relates to improvements in universal chucks forbicycle-rim-turning lathes.

My invention comprises a universal chuck having a multiplicity ofgripping-jaws, preferably sixteen in number, slidingly mounted uponcorresponding slideways in a circular disk or face-plate, the said jawsbeing arranged radially to the mandrel upon which the said disk ismounted and having a pivotal connection with the common fulcrumringarranged in a radially-slotted hub loosely mounted on said mandrel,whereby the said jaws are adapted for both an independent and universalradial adjustment.

The object of my invention is to provide a self-centering universalchuck for bicyclerim-turning lathes having a series of radialrim-gripping jaws which are adapted for both an independent and auniversal adjustment in a convenient and reliable manner.

The novel feature of my invention consists in the improved means forsecuring a simultaneous and universal adjustment of the said series ofgripping-jaws.

In the accompanying drawings similar figures of reference indicatecorresponding parts throughout the several views.

Figure 1 is a front elevation of my improved chuck in position upon thesupporting mandrel or arbor, showing the relative arrangement of thegripping-jaws in their respective guideways and gripping a vehiclerim inposition for turning its outer concave perimeter and also showing themeans for connecting the said jaws to the common fulcrum ring of theadjusting-hub, a portion of the said jaws being cut away, thecuttingtool for turning the concave perimeter being also shown in itsrelative position upon its supporting-standard. Fig. 2 is a fragmentaryview of the face-plate, showing a plan of the radial guideways and themeans for independently adjusting the gripping jaws. Fig. 3 is adiametric cross-section of the faceplate, adjusting-hub, and operatinghandwheel, showing the manner of connecting the same and also showing aside view of one of the chuck-jaws in position upon its guideways,showing the means for actuating the same and also showing a portion ofthe Vehicle-rim in position in said jaws as it appears after theoperation of shaping its outer perimeter Fig. 4: is a front end view ofone of the jaws in position with one of the retaining-plates removed.Fig. 5 is a longitudinal central section of the internally-threadedshell or sleeve adapted to contain the proximate ends of the eyebolts bywhich'the said jaws are connected to the fulcrum-ring. Fig. 6 is adetail of one of the eyebolts. Fig. 7 is a detail perspective of one ofthe grippingjaws, showing the lateral retaining-flanges for theguideways, the perforated lugs for the eyebolt, and the retaining-recessfor the vehicle-rim. Fig. Sis a plan of the radiallyslotted hub, showingthe fulcrum-ring upon which the inner end of the eyebolts are pivoted.Fig. 9 is a vertical central section of the same, showing the annulargroove by which the jaw-adjusting hand-wheel is secured to the hub andshowing a like section of the fulcrum-ring and the removable bottomplate. Fig. 10 is a detail of the fulcrumring severed at one point toadmit of the placing of the said eyebolts thereon. Fig. 11 is a detailof one of the connecting-plates'for the slotted hub.

All parts of my improvement are preferably of metal.

The circular disk or face-plate 1, on which i usual and well-understoodactuating mechanism. (Not shown in the drawings.) Thesupporting-standard 5 is of a less height than the standard 4, and theyare both rigidly 5 bolted to the base 7 Upon the said standard 5 isproperly arranged the usual actuating mechanism for both a longitudinaland a cross feed, and also for the cutting-tool 6,

none of which mechanism constitutes any 10 part of my invention andneeds no further description in this connection. The outer surface ofthe said face-plate 1 is provided with a series of recessed radialguideways, sixteen in number, in the thickened portion of the saidplate, provided with the parallel slideways 7, Fig. 2, separated by ashallow radial groove 8 of substantially equal width. Upon theseslideways the grippingj aws are adapted for radial adjustment. The innerportion of the said disk is slightly below the surface of the saidguideways, Fig. 3, which is on the same plane as the said groove 8, Fig.2.

The gripping-jaws 10, Fig. 7, are provided upon each side throughouttheir length with the lateral rectangular flanges 11 and with theupright head 13, having upon each side and upon the rear face thereofthe perforated ears 14, between which the forward end of the adjacenteyebolt is pivotally secured. The

go forward end of the said jaw has a recess 12, adapted to receive theunturned inner face of the vehicle-rim 15, as seen in Fig. 3. The jawsthus constructed are slidingly mounted upon the said slideways 7 and areloosely se- 3 5 cured therein by means of the retainingplates 9, whoseopposite edges overhang the adjacent lateral flanges ll of each pair ofadjacent jaws and are rigidly secured in such position by suitableholding-screws 16.

That portion of the forward end of thesaid mandrel 3 which extendsbeyond the said disk 1 is somewhat reduced in size and has its greaterportion screw-threaded, as shown in Fig. 3. Upon this screw-threadedportion 5 the slotted hub and its actuating hand-wheel are mounted.

The annular hub 17 has its circular base provided with a plurality ofradial vertical slots 2i, corresponding in number and ar- 0 rangementwith the said guideways 0f the face-plate 1. At or near its contractedtop is arranged an annular groove 23, Fig. 9, for the purposehereinafter described. The said hub 17 is cast in two parts, thebase-piece 18 be- 5 5 ing detachable, but is secured in position byproper holding-screws 18, Fig. 3. The two parts of the said hub have asmooth central bore 26 of sufficient diameter to slide freely upon thesaid mandrel, and they have their meeting faces provided with coincidentannular semicircular grooves adapted to inclose and secure the ring 19,severed at one point of its circumference and serves as common fulcrumor pivot for the inner ends of the eyebolts 27, presently to bedescribed, Fig. 8.

The hand-wheel 20 has a cylindrical extension upon its inner face, whichis separated from the top of the hub 17 by an annular brassfriction-plate or washer 29, Fig. 3, and has its perimeter flattened atdiametrically opposite points thereon for the securing of the upper endof the respective connecting-plates 21. central threaded bore adaptedfor a screwthreaded engagement with the said mandrel, as shown, and issecurely but loosely connected with the hub 17 by the two diametricallyopposite connecting-plates 21, their lower end being provided with aright -angular flange adapted for a loose engagement with the said hub17 in the annular recess 23, the upper end thereof being rigidly fixedto the said hand-wheel by proper holding-screws 22, Fig. 3. It isobvious that by such connection the said hand-wheel can be freelyrotated in either direction and carry the hub 17 with it in itslongitudinal adjustment upon the said mandrel without any interferencewith the relative arrangement of said hub with the said face-plate, forthe said hub has a rotative engagement with the said plates 21 and isloosely mounted upon the said mandrel. The means for connecting each ofthe said gripping-jaws with the hub 17 consists of a pair ofscrew-threaded eyebolts 27 and 28, identical in form and dimensions, anda cylindrical internally-threaded shell or sleeve 30, adapted tolongitudinally adjust the said bolts by a screw-threaded connection,Figs. 2, 3, and 5.

The bolts 27 and 28 each have upon their outer end an enlarged circularhead centrally apertured, forming an eye by which they are pivotallysecured, the former upon the ring 19 in the slots 2i of the hub 17 andthe latter upon the pin 31 in the perforated lugs 14 of the jaw 10. Thebodies of the said bolts are provided, respectively, with left-handedand right -handed screw threads, and the said shell or sleeve 30 iscorrespondingly internally screw-threaded at its extremities, thecentral portion being cored out, as screw-threads at that portion areunnecessary. The external surface of the said sleeve, at a pointintermediate its ends, is provided with plane faces for aturning-wrench. The common fulcrumring 19, severed at one point topermit of the removal or replacing of the said eyebolts thereon, isloosely mounted in the slotted base of said hub 17 and is convenientlyremovable by detaching the base-plate 18, after which The saidhand-wheel 20 has a the inner end of the eyebolt-s 27 can be removedfrom the said ring at its severed point at pleasure. The inner flangeupon the lower end of the said plates 21 is sufficiently concave tocoincide with the recess 23 of the said hub, as seen in Fig. 11, and theinner hub or flange of the hand-wheel 20 is slightly flattened atdiametricallyopposite points for the upper ends of the said plates 21.

The operation of my invention thus described is obvious, and brieflystated is sub stantially as follows: The gripping-jaws 10,

being slidably mounted upon the slideways 7 of the radial guideways ofthe face-plate 1 and secured therein by the retaining-plates 0, areadapted for a simultaneous and universal radial adjustment by a singlemovement of the operating hand-wheel 20, for as the slotted hub, throughits connection with the hand-wheel, is made to approach the faceplatethe said jaws will be simultaneously and uniformly forced outwardly, asseen in dotted outline in Fig. 3, to engage and secure a vehicle-rim ofthe largest required diameter, and a reverse adjustment of said hub uponits supporting-mandrel by the same means will likewise simultaneouslywithdraw the said jaws from their advanced position to grip and secure avehicle-rim of a less diameter, thus being adapted for convenient andready adjustment to any ordinary-sized rim, which in practice is fromtwenty-four to thirty inches for bicycle-wheels,though my improved chuckcan be constructed and operated with equal facility for any desireddiameter of rim. It is apparent that each of the said jaws is adaptedfor a convenient adjustment by the use of a wrench upon the threadedsleeve 30, as ro tatin g the said sleeve in one direction willsimultaneously spread the said eyebolts, and rotating the said sleeve inthe other or reverse direction will contract their extension. Thevehicle-rim 15 will be firmly secured in position for successivepresentation of its outer perimeter to the rim-cutting tool 6 by beingmounted in the recesses 12 of the said jaws, as seen in Fig. 3, and asthe said rim during the operation of cutting is thus braced andsupported at sixteen difierent points a perfectly true rim is invariablysecured.

It is obvious that the particular number of jaws employed is immaterial,as any plurality of said jaws simultaneously actuated and arranged asdescribed comes within the scope of my invention.

My improved universal chuck is thus simple and economical inconstruction, convenient in use, and positive, efficient, and reliablein operation.

Having thus described my invention and the manner of operating the same,what I claim as my invention, and desire to secure by Letters Patent, is

1. In a universal chuck, the combination of a centrally-apertured disk1, having upon one face thereof a plurality of radial guideways 7, aplurality of radial jaws 10 slidingly mounted in said guideways andadapted to grip the perimeter of a vehicle-rim for the purposespecified, a radially-slotted hub 17 loosely mounted upon thesupporting-man-. drel adjacent to the means for adjusting said jaws andin concentric relation to the said disk, provided with a detachablebase-plate 18 and a common fulcrum-ring 19 loosely mounted therein asshown, for the purpose specified, a pivotal connection with the said hubcomprising a pair of screw-threaded eyebolts arranged as shown in aninternallyscrew-threaded sleeve 30 for the purpose specified, and havingthe outer ends pivotally connected with the said hub and the said jawsrespectively, and the operating hand-wheel 20 having a screw-threadedconnection with the supportingmandrel 3, and a rotatable connection withthe said hub, and adapted to radially adjust the said jaws, whereby alladj ustments of said jaws can be made upon the same side of the saiddisk, substantially as described.

2. In a universal chuck, the slotted hub 17 having a radially-slottedbase provided with V VICTOR A. SALLOT. Witnesses:

NEWTON DOUGHMAN,

MARK E. D. KEPLING.

